How Perpendicular Recording Works

26th June 2006, 21:09

Data is read and write on magnetic disks thanks to the electromagnetism physics phenomena. In 1820 a physicist called Hans Christian Oersted observed while he was preparing a lab class for his Physics students that an electrical current flowing in a wire moved the needle of a compass located near this wire. When the electrical current was shut down, the compass needle went back showing the location of Earth’s magnetic north pole. With that, he came to the conclusion that all conductors (wires) create a magnetic field around them when an electrical current is flowing. When the direction (polarity) of this electrical current is reversed, so is the polarity of the magnetic field.

27th June 2006, 10:33

duno if you've seen this one before, it's been on there for a while but it's pretty funny:
http://www.hitachigst.com/hdd/resear...Animation.html

26th June 2006, 21:09	#1
TheTarget Posts: n/a	How Perpendicular Recording Works Data is read and write on magnetic disks thanks to the electromagnetism physics phenomena. In 1820 a physicist called Hans Christian Oersted observed while he was preparing a lab class for his Physics students that an electrical current flowing in a wire moved the needle of a compass located near this wire. When the electrical current was shut down, the compass needle went back showing the location of Earth’s magnetic north pole. With that, he came to the conclusion that all conductors (wires) create a magnetic field around them when an electrical current is flowing. When the direction (polarity) of this electrical current is reversed, so is the polarity of the magnetic field.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Seagate Ships 16 Millionth Perpendicular Recording Hard Drive	jmke	WebNews	0	7th February 2007 12:48
Seagate Barracuda 7200.10 750GB - Perpendicular recording at its best	jmke	WebNews	0	22nd December 2006 18:36
3.5" Perpendicular Recording Hard Drive	jmke	WebNews	2	18th April 2006 16:16
Perpendicular Recording Boosts Reliability, Performance – Seagate	jmke	WebNews	0	5th April 2006 18:30
Seagate Momentus 5400.3 160GB Hard Disk Drive with Perpendicular Technology	jmke	WebNews	0	24th February 2006 17:33
Seagate Enters Perpendicular Recording: Momentus 5400.3 Review	jmke	WebNews	0	16th February 2006 16:11
Seagate Momentus 5400.3 - 2.5" Perpendicular Recording Launch	Sidney	WebNews	0	16th January 2006 16:32
Maxtor “More Capable” of Making Perpendicular Media – Seagate Chief Executive Says	jmke	WebNews	0	23rd December 2005 02:45
Seagate Readies Rapid Shift to Perpendicular Recording Tech	jmke	WebNews	0	26th July 2005 22:38

27th June 2006, 10:33	#2
GIBSON Posts: n/a	duno if you've seen this one before, it's been on there for a while but it's pretty funny: http://www.hitachigst.com/hdd/resear...Animation.html